Finding the Fourth Proportional to 22,590.81, 31,173.72 and 12,518.28

Step by Step Solution

1. Step 1: Write the proportion equation
   22,590.81 : 31,173.72 = 12,518.28 : x
2. Step 2: Convert to fraction form
   22,590.81/31,173.72 = 12,518.28/x
3. Step 3: Cross multiply
   22,590.81x = 31,173.72 × 12,518.28
4. Step 4: Simplify right side
   22,590.81x = 390,241,355.60
5. Step 5: Solve for x
   x = 390,241,355.60/22,590.81
6. Step 6: Final answer
   x = 17,274.34